The company described 2018 as a year of “significant progress and change” with Savanta – its newly merged MIG Global data business consisting of Morar HPI, Viga, Charterhouse and Circle – named as one of its stand-out performers.

It reported that its UK businesses had performed strongly, with net revenue increasing by 43% to £83.5m from £58.3m in the previous year.

It said the growth was partly due to acquisitions, but also from strong organic net revenue growth in the UK of 15.5% with “exceptionally strong performances from our Twogether and Savanta agencies”.

In July 2018 Next 15 acquired B2B content marketing agency, Technical, which has been merged with Publitek, and in January it acquired consumer data science business, Planning-inc.

Richard Eyre, chairman of Next 15, said: “Next 15 has evolved from a pure PR group into a data and technology-driven marketing group. There is more change to come as the industry continues to evolve and as our customers wrestle with the impact technology is having on their own business models. We are excited about our future as we believe we have the right foundation platform of businesses, products, talent and customers to tackle the next stage in our evolution.”